I've changed 2 MAF sensor on my 2005 sierra 5.3l v8 truck because of code 101 &102...but engine light still comes on with same codes....101 & 102! I hardly have power t'ill I hit 4000 rpm and she's gas. What could be causing my problem other than my mass air flow sensor??

Question 1

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I have a '11 Toyota Camry LE, the VSC, and engine light are on. I have these codes from the local auto parts shop: C1201, P0171, and P0101.

code p 101 refers to mass air flow(MAF)sensor/volume air flow(VAF) sensor --range performance problem====causes --intake leak/blockage---MAF/VAF sensor

code p 0171 refers to system to lean bank 1===causes ---intake /exhaust leak---AIR system---MAF/VAF sensor ---fuel pressure/pump---injector/s---HO2S ( heated oxygen sensor --the one in the exhaust manifold before the cat converter bank 1)

I don't have a listing for the c code but from the other 2 codes I would be checking around the maf/vaf sensors and the HO2S sensor (replace)
start with checking the wiring and connections to both units

Oct 29, 2016 • Toyota Cars & Trucks

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My grand vitara is surging and running rich. has no power and stalls

Is the check engine light on?If so what codes are up?

Feb 14, 2013 • 2000 Suzuki Grand Vitara

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1answer

I got a code for the MAF SENSOR so I bought the piece and it cause my car to stall out. So I put the old piece in AND the car is running normal. the check engine light went off and comes on then goes off...

Code 102 means the MAF sensor is telling the computer there is very little air flow into the intake. Normally the airflow is lower at idle than when you are accelerating, but the sensor reading is lower than spec.
You could have a leaking hose between the MAF and the throttle body, or a vac leak somewhere else, the sensor could be faulty, or you could have a problem with the wiring harness.
All of these possible causes would apply to the replacement sensor that did not work.

Feb 06, 2013 • Cars & Trucks

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1answer

Replaced 02 sensor with code 131 and 171 now getting p0053

Code 53 is for a problem with the heater in the O2 sensor for bank one sensor one. It could be something in the wiring or you could have a defective sensor.

Jan 13, 2013 • 2005 GMC Sierra

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2answers

After testing the MAF sensor, changing the PCV & CO sensors, I still get the check engine light, 1999 ford explorer sport 4.0 SOHC 6 cyl I've read to check the intake manifold and then go fu

What is a CO sensor? Never heard of it. a 1999 OBD2 ford has approximately 1600 possible fault codes most of which can turn on the light. If you dont know which one is turning it on, you are guessing randomly which is expensive and usually unsuccessful. get the code(s) and then diagnose the possible causes. The vehicle you list (99 4L explorer) rarely had injector problems. Much more common were EGR sensor(DPFE) sticking at voltage, evap problems, misfires, and lean conditions due to dirty MAF, or vacuum leaks. get the fault code, or you will not fix the problem.

Dec 29, 2012 • 2007 Toyota Land Cruiser

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1answer

I have an '02 VW Cabrio that is giving me random 171 and occasional 102 OBD codes. I looked for and found a split hose near the air filter housing and replaced. I've not found any others with...

1st have you replaced the O2 sensor? Here is the technical stuff about this fault code
OBD 2 fault code P0171 VOLKSWAGEN - Fuel control System To lean engine cylinder bank number #1.
Possible causes:
Possible causes- Intake air leaks, spray propane around the intake manifold gasket and all vacuum connections and listen for a change in the engine idle speeds, any change indicates a leak.
- Faulty front heated oxygen sensor (a common cause if the car has over 50,000 miles on it)
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure Hook up a fuel gauge and make sure the fuel pressure is good/in specs under a load.
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection

Oct 02, 2011 • 2002 Volkswagen Cabrio

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Car is a 2004lincoln ls v8...its misfiring in cylinders..had a tune up didnt help,computer said throttle accelerater stuck closed and sounds like transmission is slipping?????

There is no tune -up for your car

I have the same car ,V8 --- only spark plugs

You have a bad COP Ignition Coil -- give us the code PO301 thru PO308

Change the front (2) O2 Sensors at 100,000 miles

Change spark plugs every 3 years or 60,000 miles

Clean MAF Sensor once or twice a year

If the Trans Slips ---STOP USING IT -- & change the solenoid pressure
control pack, inside trans oil pan

The bad coil is spiking the PCM & the signal comes back on the TPS
Sensor & you get throttle body (TACM) codes,forget that,work on the coils

Aug 11, 2011 • 2004 Lincoln LS

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1answer

2002 GMC sierra system too lean(bank 2). Code P0174.

Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1.

Note: This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.

Symptoms: You will more than likely not notice any drivability problems, although there may be symptoms such as a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration.

Causes: A code P0174 may mean that one or more of the following has happened:
* The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
* There could be a vacuum leak downstream of the MAF sensor.

Possible solutions include:
* In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
* Inspect all vacuum and PCV hoses, replace if necessary
* Check for a dirty fuel filter and proper fuel pressure

Hope this helps (remember to rate this answer).

Nov 23, 2010 • 2002 GMC Sierra 1500

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1answer

Truck starts fine but stumbles at idle and stalls out whenever i give it any gas. This happened over night yesterday. I've changed plugs and wires and checked all the coils. I've changed MAF sensor....

maybe

Apr 15, 2017 • 2003 GMC Sierra 2500HD

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2answers

CODE PO102

sounds like the mass air flow sensor. It is in the intake line squareish part with 2 tamper [proof torque screws.

Nov 12, 2008 • 2002 Pontiac Grand Prix

Question 2

Anonymous

If I were to go by what people say on this site, I
would be led to believe everyone works on their
own vehicles & no one really does

If a repair shop is changing parts, they failed to find
the real issues & you seek out another shop to loose
your money at

The codes are for a circuit malfunction
That doesn't mean the sensor was bad

I would be looking at all data parameters, on a road
test, with you along for the experience

I would record the data & also look at fuel trim & resolve
the MAF Codes before we move on to possible other issues
& you many very well have more than one problem

Todays vehicles require the use of factory reference material
You can't fix what you don't understand,no matter who you are,
or how good you are.

4 more comments
Anonymous Mar 07, 2013

Hey Peter! Not sure if u got my response yesterday.....but I'll try ur suggestions and I hear you with all the opinions that came with it.....lol!!
Anonymous Mar 07, 2013

Not opinions to offend you I have 50 years experience You have to diagnose the codes you have ,using professional tools & have reference materials
Anonymous Mar 07, 2013

I have to add that there is no reason to change 2 MAF Sensors as that tells me no testing was done & when you have a repair shop do that & come home & come here & dsay you still have a check light on then the vehicle wasn't properly diagnosed & you paid for that
Anonymous Mar 07, 2013

Now you want someone without the vehicle to guess at a solution I owned a shop once & have delt with customers on a fishing trip all too often
Anonymous Mar 07, 2013

The reason for the change!......the code was never erased and I blame nobody for that. After all we are humans and we do make mistakes.....right? As for your suggestions, I will follow through and appreciate ur input Pete.....thanx, Joe
Anonymous Mar 07, 2013

Welcome--In most cases when the proper repair is made the check light will go out If you were to turn off the check light you clear all data & you don't want to do that as you have to wait for monitors to run to get codes back & get back to what you were working on When a shop gives you a vehicle back it has to be road tested at least 25 miles & codes cleared I'm not seeing that on this site thus my opinions or speculation

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Answer 2

Bogdan Odwazny

GMC Master 6,171 Answers
Posted on Mar 06, 2013

Bogdan Odwazny

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Joined: Jan 20, 2013

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Check for broken wire and leaks.

Anonymous Mar 06, 2013

Already checked for leaks and it's all good. Did a visual for broken wire also but can check again I guess!#?

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Related Topics:

I've changed 2 MAF sensor on my 2005 sierra 5.3l v8 truck because of code 101 &102...but engine light still comes on with same codes....101 & 102! I hardly have power t'ill I hit 4000 rpm and she's gas. What could be causing my problem other than my mass air flow sensor??

2 Answers

Anonymous

Bogdan Odwazny

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Attachments: Added items

Related Questions:

I have a '11 Toyota Camry LE, the VSC, and engine light are on. I have these codes from the local auto parts shop: C1201, P0171, and P0101.

My grand vitara is surging and running rich. has no power and stalls

I got a code for the MAF SENSOR so I bought the piece and it cause my car to stall out. So I put the old piece in AND the car is running normal. the check engine light went off and comes on then goes off...

Replaced 02 sensor with code 131 and 171 now getting p0053

After testing the MAF sensor, changing the PCV & CO sensors, I still get the check engine light, 1999 ford explorer sport 4.0 SOHC 6 cyl I've read to check the intake manifold and then go fu

I have an '02 VW Cabrio that is giving me random 171 and occasional 102 OBD codes. I looked for and found a split hose near the air filter housing and replaced. I've not found any others with...

Car is a 2004lincoln ls v8...its misfiring in cylinders..had a tune up didnt help,computer said throttle accelerater stuck closed and sounds like transmission is slipping?????

2002 GMC sierra system too lean(bank 2). Code P0174.

Truck starts fine but stumbles at idle and stalls out whenever i give it any gas. This happened over night yesterday. I've changed plugs and wires and checked all the coils. I've changed MAF sensor....

CODE PO102

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2005 Sierra

I have a '11 Toyota Camry LE, the VSC, and engine light are on. I have these codes from the local auto parts shop: C1201, P0171, and P0101.

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Related Topics:

I've changed 2 MAF sensor on my 2005 sierra 5.3l v8 truck because of code 101 &102...but engine light still comes on with same codes....101 & 102! I hardly have power t'ill I hit 4000 rpm and she's gas. What could be causing my problem other than my mass air flow sensor??

2 Answers

Anonymous

Bogdan Odwazny

Add Your Answer

Attachments: Added items

Related Questions:

I have a '11 Toyota Camry LE, the VSC, and engine light are on. I have these codes from the local auto parts shop: C1201, P0171, and P0101.

My grand vitara is surging and running rich. has no power and stalls

I got a code for the MAF SENSOR so I bought the piece and it cause my car to stall out. So I put the old piece in AND the car is running normal. the check engine light went off and comes on then goes off...

Replaced 02 sensor with code 131 and 171 now getting p0053

After testing the MAF sensor, changing the PCV & CO sensors, I still get the check engine light, 1999 ford explorer sport 4.0 SOHC 6 cyl I've read to check the intake manifold and then go fu

I have an '02 VW Cabrio that is giving me random 171 and occasional 102 OBD codes. I looked for and found a split hose near the air filter housing and replaced. I've not found any others with...

Car is a 2004lincoln ls v8...its misfiring in cylinders..had a tune up didnt help,computer said throttle accelerater stuck closed and sounds like transmission is slipping?????

2002 GMC sierra system too lean(bank 2). Code P0174.

Truck starts fine but stumbles at idle and stalls out whenever i give it any gas. This happened over night yesterday. I've changed plugs and wires and checked all the coils. I've changed MAF sensor....

CODE PO102

Not finding what you are looking for?

2005 Sierra

I have a '11 Toyota Camry LE, the VSC, and engine light are on. I have these codes from the local auto parts shop: C1201, P0171, and P0101.

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